先叫出动作。

.anim-el {
  animation-iteration-count: infinite;
  animation-fill-mode: both;
}
:root { --anim-accent: #6d5efc; }

.fade-up-item {
  animation-name: fadeUp;
  animation-duration: var(--anim-duration, 2.2s);
  animation-timing-function: var(--anim-easing, cubic-bezier(0.16, 1, 0.3, 1));
  padding: 16px 22px;
  border-radius: 12px;
  background: var(--surface, #fff);
  border: 1px solid var(--border, #e6e7ec);
  font: 600 14px/1 'Plus Jakarta Sans', system-ui, sans-serif;
  color: var(--ink, #1a1c22);
}
@keyframes fadeUp {
  0% { opacity: 0; transform: translateY(26px); }
  30%, 100% { opacity: 1; transform: translateY(0); }
}

.anim-el {
  animation-iteration-count: infinite;
  animation-fill-mode: both;
}
:root { --anim-accent: #6d5efc; }

.stagger { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; width: min(220px, 100%); }
.stagger .anim-el {
  animation-name: fadeUp;
  animation-duration: var(--anim-duration, 2.6s);
  animation-timing-function: var(--anim-easing, cubic-bezier(0.16, 1, 0.3, 1));
  padding: 14px 18px;
  border-radius: 10px;
  background: var(--surface, #fff);
  border: 1px solid var(--border, #e6e7ec);
  font: 600 14px/1 'Plus Jakarta Sans', system-ui, sans-serif;
  color: var(--ink, #1a1c22);
}
.stagger .anim-el:nth-child(2) { animation-delay: 0.14s; }
.stagger .anim-el:nth-child(3) { animation-delay: 0.28s; }

@keyframes fadeUp {
  0% { opacity: 0; transform: translateY(26px); }
  30%, 100% { opacity: 1; transform: translateY(0); }
}

.anim-el {
  animation-iteration-count: infinite;
  animation-fill-mode: both;
}
:root { --anim-accent: #6d5efc; }

.hover-lift-card {
  animation-name: lift;
  animation-duration: var(--anim-duration, 2.4s);
  animation-timing-function: var(--anim-easing, ease-in-out);
  width: min(200px, 100%);
  padding: 18px;
  border-radius: 14px;
  background: var(--surface, #fff);
  border: 1px solid var(--border, #e6e7ec);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.08);
  font: 600 14px/1.3 'Plus Jakarta Sans', system-ui, sans-serif;
  color: var(--ink, #1a1c22);
}
@keyframes lift {
  0%, 60%, 100% { transform: translateY(0); box-shadow: 0 1px 2px rgba(0, 0, 0, 0.08); }
  30% { transform: translateY(-12px); box-shadow: 0 20px 34px -14px rgba(0, 0, 0, 0.28); }
}

.anim-el {
  animation-iteration-count: infinite;
  animation-fill-mode: both;
}
:root { --anim-accent: #6d5efc; }

.button-press-btn {
  animation-name: press;
  animation-duration: var(--anim-duration, 1.6s);
  animation-timing-function: var(--anim-easing, ease-in-out);
  border: 0;
  border-radius: 12px;
  padding: 14px 26px;
  font: 600 15px/1 'Plus Jakarta Sans', system-ui, sans-serif;
  color: #fff;
  background: var(--anim-accent);
  cursor: pointer;
}
@keyframes press {
  0%, 100% { transform: scale(1); }
  40%, 60% { transform: scale(0.94); }
}

.anim-el {
  animation-iteration-count: infinite;
  animation-fill-mode: both;
}
:root { --anim-accent: #6d5efc; }

.ripple-btn {
  position: relative;
  overflow: hidden;
  border: 0;
  border-radius: 12px;
  padding: 14px 26px;
  font: 600 15px/1 'Plus Jakarta Sans', system-ui, sans-serif;
  color: #fff;
  background: var(--anim-accent);
  cursor: pointer;
}
.ripple-btn .ripple-dot {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 12px;
  height: 12px;
  margin: -6px 0 0 -6px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.6);
  animation-name: ripple;
  animation-duration: var(--anim-duration, 1.8s);
  animation-timing-function: var(--anim-easing, ease-out);
}
@keyframes ripple {
  0% { transform: scale(1); opacity: 0.55; }
  100% { transform: scale(16); opacity: 0; }
}

.anim-el {
  animation-iteration-count: infinite;
  animation-fill-mode: both;
}
:root { --anim-accent: #6d5efc; }

.skel-wrap { width: min(220px, 100%); display: grid; gap: 12px; }
.skel-line {
  height: 16px;
  border-radius: 8px;
  background: linear-gradient(90deg, #e7e8ee 25%, #f6f7fa 37%, #e7e8ee 63%);
  background-size: 200% 100%;
  animation-name: shimmer;
  animation-duration: var(--anim-duration, 1.4s);
  animation-timing-function: var(--anim-easing, ease-in-out);
}
.skel-line:nth-child(2) { width: 80%; }
.skel-line:nth-child(3) { width: 60%; }
@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.anim-el {
  animation-iteration-count: infinite;
  animation-fill-mode: both;
}
:root { --anim-accent: #6d5efc; }

.dots { display: flex; gap: 12px; }
.dots .dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--anim-accent);
  animation-name: dotBounce;
  animation-duration: var(--anim-duration, 1.2s);
  animation-timing-function: var(--anim-easing, ease-in-out);
}
.dots .dot:nth-child(2) { animation-delay: 0.15s; }
.dots .dot:nth-child(3) { animation-delay: 0.3s; }
@keyframes dotBounce {
  0%, 100% { transform: translateY(0); opacity: 0.5; }
  50% { transform: translateY(-9px); opacity: 1; }
}

.anim-el {
  animation-iteration-count: infinite;
  animation-fill-mode: both;
}
:root { --anim-accent: #6d5efc; }

.prog { width: min(240px, 100%); }
.prog-track {
  height: 10px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--anim-accent) 16%, #e7e8ee);
  overflow: hidden;
}
.prog-fill {
  height: 100%;
  border-radius: 999px;
  background: var(--anim-accent);
  animation-name: fill;
  animation-duration: var(--anim-duration, 2.2s);
  animation-timing-function: var(--anim-easing, cubic-bezier(0.16, 1, 0.3, 1));
}
.prog-label { margin-top: 10px; font: 500 12px/1 'IBM Plex Mono', monospace; color: var(--mute, #6b6f7a); text-align: right; }
@keyframes fill {
  0% { width: 0%; }
  70%, 100% { width: 100%; }
}

.anim-el {
  animation-iteration-count: infinite;
  animation-fill-mode: both;
}
:root { --anim-accent: #6d5efc; }

.shake-box {
  animation-name: shake;
  animation-duration: var(--anim-duration, 1.6s);
  animation-timing-function: var(--anim-easing, ease-in-out);
  padding: 14px 22px;
  border-radius: 12px;
  border: 1px solid #ef4444;
  background: color-mix(in srgb, #ef4444 8%, #fff);
  color: #dc2626;
  font: 600 14px/1 'Plus Jakarta Sans', system-ui, sans-serif;
}
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  15% { transform: translateX(-6px); }
  30% { transform: translateX(6px); }
  45% { transform: translateX(-5px); }
  60% { transform: translateX(5px); }
  75% { transform: translateX(-3px); }
}

.anim-el {
  animation-iteration-count: infinite;
  animation-fill-mode: both;
}
:root { --anim-accent: #6d5efc; }

.check { width: 72px; height: 72px; }
.check circle { fill: none; stroke: var(--anim-accent); stroke-width: 3; opacity: 0.25; }
.check path {
  fill: none;
  stroke: var(--anim-accent);
  stroke-width: 4;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 60;
  animation-name: draw;
  animation-duration: var(--anim-duration, 1.8s);
  animation-timing-function: var(--anim-easing, ease-in-out);
}
@keyframes draw {
  0% { stroke-dashoffset: 60; }
  70%, 100% { stroke-dashoffset: 0; }
}

.anim-el {
  animation-iteration-count: infinite;
  animation-fill-mode: both;
}
:root { --anim-accent: #6d5efc; }

.toast {
  padding: 12px 18px;
  border-radius: 10px;
  background: var(--ink, #1a1c22);
  color: #fff;
  font: 600 13px/1 'Plus Jakarta Sans', system-ui, sans-serif;
  box-shadow: 0 12px 30px -14px rgba(0, 0, 0, 0.5);
  animation-name: toast;
  animation-duration: var(--anim-duration, 3s);
  animation-timing-function: var(--anim-easing, cubic-bezier(0.16, 1, 0.3, 1));
}
@keyframes toast {
  0% { opacity: 0; transform: translateY(20px); }
  15%, 75% { opacity: 1; transform: translateY(0); }
  100% { opacity: 0; transform: translateY(20px); }
}

.anim-el {
  animation-iteration-count: infinite;
  animation-fill-mode: both;
}
:root { --anim-accent: #6d5efc; }

.scroll-demo { width: min(240px, 100%); height: 150px; border-radius: 12px; overflow: hidden; border: 1px solid var(--border, #e6e7ec); background: var(--surface, #fff); position: relative; }
.scroll-track { position: absolute; inset: 0; display: grid; place-items: center; }
.scroll-panel {
  animation-name: reveal;
  animation-duration: var(--anim-duration, 2.6s);
  animation-timing-function: var(--anim-easing, cubic-bezier(0.16, 1, 0.3, 1));
  width: 150px;
  padding: 16px;
  border-radius: 10px;
  background: color-mix(in srgb, var(--anim-accent) 12%, #fff);
  border: 1px solid color-mix(in srgb, var(--anim-accent) 30%, #e6e7ec);
  color: var(--ink, #1a1c22);
  font: 600 13px/1.4 'Plus Jakarta Sans', system-ui, sans-serif;
  text-align: center;
}
@keyframes reveal {
  0% { opacity: 0; transform: translateY(46px); }
  30%, 100% { opacity: 1; transform: translateY(0); }
}

.anim-el {
  animation-iteration-count: infinite;
  animation-fill-mode: both;
}
:root { --anim-accent: #6d5efc; }

.parallax { width: min(240px, 100%); height: 150px; border-radius: 12px; overflow: hidden; position: relative; background: #0f1226; }
.parallax .par-layer { position: absolute; inset: -20px; }
.parallax .par-back {
  background: radial-gradient(60% 60% at 30% 30%, color-mix(in srgb, var(--anim-accent) 70%, transparent), transparent 70%), radial-gradient(50% 50% at 75% 70%, #2a2f5e, transparent 70%);
  animation-name: parBack;
  animation-duration: var(--anim-duration, 3s);
  animation-timing-function: var(--anim-easing, ease-in-out);
}
.parallax .par-front {
  background: radial-gradient(40% 40% at 60% 40%, rgba(255, 255, 255, 0.35), transparent 70%);
  animation-name: parFront;
  animation-duration: var(--anim-duration, 3s);
  animation-timing-function: var(--anim-easing, ease-in-out);
}
@keyframes parBack { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-16px); } }
@keyframes parFront { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(12px); } }

.anim-el {
  animation-iteration-count: infinite;
  animation-fill-mode: both;
}
:root { --anim-accent: #6d5efc; }

.drawer-demo { width: min(240px, 100%); height: 150px; border-radius: 12px; overflow: hidden; position: relative; background: var(--surface-2, #eef0f5); border: 1px solid var(--border, #e6e7ec); }
.drawer {
  position: absolute;
  top: 0;
  right: 0;
  height: 100%;
  width: 62%;
  padding: 16px;
  background: var(--surface, #fff);
  border-left: 1px solid var(--border, #e6e7ec);
  box-shadow: -16px 0 30px -18px rgba(0, 0, 0, 0.3);
  animation-name: drawer;
  animation-duration: var(--anim-duration, 2.4s);
  animation-timing-function: var(--anim-easing, cubic-bezier(0.4, 0, 0.2, 1));
  font: 600 13px/1.5 'Plus Jakarta Sans', system-ui, sans-serif;
  color: var(--ink, #1a1c22);
}
@keyframes drawer {
  0%, 15% { transform: translateX(110%); }
  35%, 75% { transform: translateX(0); }
  95%, 100% { transform: translateX(110%); }
}

.anim-el {
  animation-iteration-count: infinite;
  animation-fill-mode: both;
}
:root { --anim-accent: #6d5efc; }

.pulse-cta-btn {
  animation-name: pulse;
  animation-duration: var(--anim-duration, 1.8s);
  animation-timing-function: var(--anim-easing, ease-in-out);
  border: 0;
  border-radius: 12px;
  padding: 14px 26px;
  font: 600 15px/1 'Plus Jakarta Sans', system-ui, sans-serif;
  color: #fff;
  background: var(--anim-accent);
  cursor: pointer;
}
@keyframes pulse {
  0%, 100% { transform: scale(1); box-shadow: 0 8px 20px -8px color-mix(in srgb, var(--anim-accent) 45%, transparent); }
  50% { transform: scale(1.05); box-shadow: 0 10px 34px -6px color-mix(in srgb, var(--anim-accent) 65%, transparent); }
}

.anim-el {
  animation-iteration-count: infinite;
  animation-fill-mode: both;
}
:root { --anim-accent: #6d5efc; }

.marquee {
  overflow: hidden;
  white-space: nowrap;
  width: min(240px, 100%);
  border-radius: 10px;
  padding: 12px 0;
  background: var(--surface, #fff);
  border: 1px solid var(--border, #e6e7ec);
  animation-name: marquee;
  animation-duration: var(--anim-duration, 6s);
  animation-timing-function: var(--anim-easing, linear);
}
.marquee span {
  display: inline-block;
  padding-left: 100%;
  font: 600 14px/1 'IBM Plex Mono', monospace;
  color: var(--ink, #1a1c22);
}
@keyframes marquee {
  0% { transform: translateX(0); }
  100% { transform: translateX(-100%); }
}

.anim-el {
  animation-iteration-count: infinite;
  animation-fill-mode: both;
}
:root { --anim-accent: #6d5efc; }

.type {
  overflow: hidden;
  white-space: nowrap;
  font: 600 16px/1.3 'IBM Plex Mono', monospace;
  color: var(--ink, #1a1c22);
  animation-name: typing;
  animation-duration: var(--anim-duration, 3.4s);
  animation-timing-function: var(--anim-easing, steps(12, end));
}
.type .caret {
  display: inline-block;
  width: 2px;
  height: 1.1em;
  background: var(--anim-accent);
  margin-left: 3px;
  vertical-align: -0.15em;
}
.caret { animation: blink 1s steps(1) infinite; }
@keyframes blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}
@keyframes typing {
  0% { clip-path: inset(0 100% 0 0); }
  55%, 100% { clip-path: inset(0 0 0 0); }
}

.anim-el {
  animation-iteration-count: infinite;
  animation-fill-mode: both;
}
:root { --anim-accent: #6d5efc; }

.glow {
  position: relative;
  padding: 16px 22px;
  border-radius: 14px;
  background: var(--surface, #fff);
  color: var(--ink, #1a1c22);
  font: 600 14px/1 'Plus Jakarta Sans', system-ui, sans-serif;
  isolation: isolate;
}
.glow::before {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: inherit;
  background: conic-gradient(from 0deg, var(--anim-accent), transparent 35%, var(--anim-accent));
  z-index: -1;
  animation-name: spin;
  animation-duration: var(--anim-duration, 4s);
  animation-timing-function: var(--anim-easing, linear);
}
@keyframes spin {
  to { transform: rotate(360deg); }
}

.anim-el {
  animation-iteration-count: infinite;
  animation-fill-mode: both;
}
:root { --anim-accent: #6d5efc; }

.morph { position: relative; width: 72px; height: 72px; }
.morph svg { position: absolute; inset: 0; width: 72px; height: 72px; }
.morph .morph-a {
  animation-name: morphA;
  animation-duration: var(--anim-duration, 2s);
  animation-timing-function: var(--anim-easing, ease-in-out);
  stroke: var(--anim-accent);
}
.morph .morph-b {
  animation-name: morphB;
  animation-duration: var(--anim-duration, 2s);
  animation-timing-function: var(--anim-easing, ease-in-out);
  stroke: var(--anim-accent);
}
@keyframes morphA {
  0%, 45% { opacity: 1; transform: rotate(0) scale(1); }
  55%, 100% { opacity: 0; transform: rotate(90deg) scale(0.6); }
}
@keyframes morphB {
  0%, 45% { opacity: 0; transform: rotate(-90deg) scale(0.6); }
  55%, 100% { opacity: 1; transform: rotate(0) scale(1); }
}

.anim-el {
  animation-iteration-count: infinite;
  animation-fill-mode: both;
}
:root { --anim-accent: #6d5efc; }

.flip { perspective: 700px; width: min(150px, 100%); height: 100px; }
.flip-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  animation-name: flip;
  animation-duration: var(--anim-duration, 3.2s);
  animation-timing-function: var(--anim-easing, cubic-bezier(0.4, 0, 0.2, 1));
}
.flip-front,
.flip-back {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  border-radius: 12px;
  backface-visibility: hidden;
  font: 600 14px/1 'Plus Jakarta Sans', system-ui, sans-serif;
}
.flip-front { background: var(--anim-accent); color: #fff; }
.flip-back {
  background: var(--surface, #fff);
  border: 1px solid var(--border, #e6e7ec);
  color: var(--ink, #1a1c22);
  transform: rotateY(180deg);
}
@keyframes flip {
  0%, 40% { transform: rotateY(0); }
  60%, 100% { transform: rotateY(180deg); }
}